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Finding the Fourth Proportional to 100,318.59, 150,478.17 and 25,438.78

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Solution

The fourth proportional to 100,318.59, 150,478.17 and 25,438.78 is: 38,158.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,318.59 : 150,478.17 = 25,438.78 : x
  2. Step 2: Convert to fraction form
    100,318.59/150,478.17 = 25,438.78/x
  3. Step 3: Cross multiply
    100,318.59x = 150,478.17 × 25,438.78
  4. Step 4: Simplify right side
    100,318.59x = 3,827,981,613.13
  5. Step 5: Solve for x
    x = 3,827,981,613.13/100,318.59
  6. Step 6: Final answer
    x = 38,158.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.